CELL STACK DEVICE, MODULE, AND MODULE STORAGE DEVICE

To prevent, in a cell stack device obtained by fixing cells to a support member with a fixing material, the generation of cracks near the boundary surface between the fixing material and cells or the fixing material and support member.SOLUTION: A cell stack device comprises: a cell stack in which a plurality of cells 1 are stacked; and a fixing member that fixes the cells 1. The fixing member has a support member 7b that supports the plurality of cells 1, and a fixing material 7a that is arranged between the support member 7a and cells 1. On a cross section including the support member 7b, fixing material 7a, and at least one cell 1 of the plurality of cells 1, the fixing material 7a includes a first area 7a1 that is located closer to the support member 7b, a second area 7a2 that is located closer to the cell 1 than the first area 7a1, and a third area 7a3 that is located between the first area 7a1 and second area 7a2. At least one of the first area 7a1 and second area 7a2 includes a porous area 7a4 that has a higher porosity than the porosity of the third area 7a3.SELECTED DRAWING: Figure 3B 【課題】セルを支持部材に固定材で固定したセルスタック装置において、固定材とセル、又は固定材と支持部材との界面付近でのクラック発生を抑制する。【解決手段】セルスタック装置は、複数のセル１が積層されたもので、セル１を固定する固定部材とを備えている。固定部材は、複数のセル１を支持する支持部材７ｂと、支持部材７ｂとセル１との間に配置された固定材７ａとを有する。支持部材７ｂ、固定材７ａ、及び複数のセル１のうち少なくとも１つのセル１を含む断面において、固定材７ａは、支持部材７ｂ側に位置する第一領域７ａ１と、第一領域７ａ１よりもセル１側に位置する第二領域７ａ２と、第一領域７ａ１と第二領域７ａ２との間に位置する第三領域７ａ３とを含んでいる。第一領域７ａ１及び第二領域７ａ２のうち少なくとも一方は、第三領域７ａ３の気孔率より高い気孔率を有する多孔質領域７ａ４を含む。【選択図】図３Ｂ